I have been thinking about a D800 as I understand that the full frame cameras are better than their DX cousins in low light. I didn't understand the tech to be honest but took it on spec. My D700 performs brilliantly in low light but I want the video option. I went to Greys of Westminster (what a place) to ask abut the 800. The guy there says that as the 800 has so many megapixels the low light performance won't be as good. I didn't get it but didn't have the guts to quiz the guy further as he had already given me a 'what, you didn't work it out for yourself' kind of looks.

So, any opinions out there.

I am looking for an excuse to just go for a D7000 and the new 18-300 (27-450) Nikon lens